nip2: Nip2 is a GTK frontend for VIPS, an image processing library/suite1

Nip2 aims to be halfway between Excel and Photoshop. You don't directly
edit images, instead, like a spreadsheet, you build relationships between
objects. When you make a change somewhere, nip2 will recalculate the
objects affected by that change. Since it is demand-driven, this update is
usually (almost) instant, even for very very large images.